418 
Subgen. Pylaiella (Bory). 
96. E. littoralis (L.) Lyngb. emend. Kuckuck, Beitrage zur 
Kenntnis einiger Ectocarpus-Arten der Kieler Fohrde, p. 7; Lyngb., 
Hydrophyt., p. 130; Pylaiella littoralis Kjellm., N. I., p. 346 (281), 
Handb., p. 83. 
var. opposita Kjellm., Handb., p. 84; Kuck., 1. c. p. 8. 
var. firma Ag.; Kjellm., Handb., p. 84; Kuck., 1. c. p. 8. 
var. divaricata Kjellm., Handb., p. 85; Kuck., 1. c. p. 11. 
var. varia (Kjellm.) Kuck., 1. c. p. 12; Pyl. varia Kjellm., N. I., 
p. 348 (282), tab. 27, figs. 1—12; Handb., p. 83. 
I think I have been able to discern some of the forms referred 
by Kj ell man and Kuckuck to each of the above-mentioned 
main groups. 
Thus, of var. opposita I have found, besides the typical form, 
f. rupincola Aresch. (Kjellm. and Kuck., 1. c.) and a few specimens 
which agreed fairly well with Kuckuck’s descriptions of f. subverti- 
cillata and f. rectangulans. 
Of var. firma, besides f. typica, some specimens were found 
which seemed to answer to Kuckuck’s description of f. subglomerata. 
Of var. divaricata, I think I have found, besides the typical 
form, f. ramellosa Kuck., 1. c., and f. prcetorta Kjellm., 1. c. 
Of var. varia, which occurred at a single place only, I have 
only found the typical form. 
Lyngb y e mentions in Hydrophyt., 1. c. p. 131, tab. 42 C, a 
d protensus of which there are several specimens in his herbarium 
in Copenhagen, some of which are like var. opposita, while others, 
judging from the very much decayed material, appear to belong to 
other Ectocarpus- species. 
This alga, which is one of the most common along the coasts 
of the Faeroes, occurs both in the littoral zone and in the sublittoral, 
but usually not at any great depth. 
On exposed coast in damp clefts and fissures in the rock, 
especially in places where fresh-water oozes out, it can grow at a 
considerable height above high-water mark (upwards of 10 feet). 
This plant occurs sometimes as an epiphyte, sometimes as a 
dense, brown covering on rocks; it is found abundantly at the exit 
of the streams. Var. varia was found in loose examples amongst 
other algae. 
Plurilocular sporangia occurred in May, June, July and Oc- 
